US6250675B1 - Airbag, method of folding the latter, and device for carrying out the method - Google Patents
Airbag, method of folding the latter, and device for carrying out the method Download PDFInfo
- Publication number
- US6250675B1 US6250675B1 US09/194,373 US19437399A US6250675B1 US 6250675 B1 US6250675 B1 US 6250675B1 US 19437399 A US19437399 A US 19437399A US 6250675 B1 US6250675 B1 US 6250675B1
- Authority
- US
- United States
- Prior art keywords
- airbag
- spread
- folding
- constriction
- tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 18
- 238000012856 packing Methods 0.000 claims description 5
- 230000000739 chaotic effect Effects 0.000 abstract description 11
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000736305 Marsilea quadrifolia Species 0.000 description 1
- 241000219793 Trifolium Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/237—Inflatable members characterised by the way they are folded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/237—Inflatable members characterised by the way they are folded
- B60R2021/2375—Folding devices
Definitions
- the invention relates to an airbag, a method for folding same and a device for carrying out the method.
- an airbag for an airbag module wherein the airbag has main folds which run at least in part along closed tracks round an imaginary centre on the substantially empty spread-out airbag.
- the closed main folds describe preferably circular paths or ellipses of slight eccentricity.
- This path for the main folds has the advantage that the folded airbag can open very rapidly and easily. More particularly during the unfolding of such an airbag there is not the danger that the internal pressure produced in partial areas of the airbag will prevent the opening of further folds.
- This airbag can thereby be used for driver, passenger and side airbags.
- the drawback with this folding is that the expense for mechanical folding is high.
- the object of the present invention is to fold the airbag so that on the one hand it can be easily and completely unfolded and on the other the expense of folding the airbag is reduced.
- the airbag has in the folded position at least one continuous constriction as well as ordered and/or chaotic folds. More particularly, it is proposed that the folds in the areas of the airbag divided by the constriction run separated without overlapping the constriction.
- the constriction extends from the top side to the bottom side of the airbag. More particularly, the constriction extends in one embodiment at right angles to the plane of the spread-out unfolded airbag through same.
- the advantage of this constriction is that it has a positive effect particularly on the chaotic folding.
- the drawback with chaotic folding that areas of the airbag overlap whereby unfolding of the airbag is impeded, is substantially avoided by the provision of at least one constriction.
- the airbag for a driver airbag module preferably has four constrictions.
- At least one constriction is provided which runs between the upper side and the lower side of the airbag.
- the upper and lower parts of the airbag are separated at least in part, and both parts also have separate folds.
- the fact that the folds of the upper part do not project into the folds of the lower part has a particularly advantageous effect on the all-round rapid unfolding of the airbag.
- the outer areas of the airbag are moved inwards close to the gas generator or diffuser.
- One method for folding an airbag is characterized according to the invention in that the spread-out airbag is constricted at least once continuously on at least one side and that it is then folded and/or compressed to the extent required for stowage in the airbag module.
- the airbag is folded separately in areas which are separated by a constriction.
- the airbag in a first embodiment in the case of an airbag which has an upper side and a lower side, the airbag is constricted from the upper to the lower side.
- the constriction carried out in the first stage represents a pre-folding for the following orderly or chaotic folding.
- the airbag is preferably constricted at right angles to the plane of the spread-out airbag.
- constrictions deviating from the perpendicular are also possible to obtain the advantages.
- the airbag is constricted on one side or on several sides.
- the airbag for a passenger airbag module is preferably constricted from one side.
- the spread-out airbag, which is only provided with the one constriction, has prior to compression the shape of a human molar tooth with two roots.
- the airbag for a driver airbag module is preferably constricted on four sides whereby the preferably take place simultaneously.
- the spread-out airbag which is only provided with the four constrictions has prior to compression the shape of a four-leaved clover.
- the constrictions previously provided have the effect that the ordered and/or chaotic folds produced are each only formed inside the area defined by the constrictions, i.e. the folds do not overlap the constrictions. Overlapping of in particular the chaotic folds is thereby substantially avoided.
- the constrictions are also obtained after the chaotic folding.
- the airbag is constricted between its upper and lower side and that then both sides are folded and/or compressed separately.
- a device for folding an airbag is characterized according to the invention in that one tool each is provided for producing each constriction, that the spread-out airbag and the tool can be moved relative to each other in the plane of the spread-out airbag and that folding tools and/or slider-like tools for compressing the airbag to the storage size are provided above and/or at the side of the spread-out airbag.
- the tool for producing a constriction extends perpendicular to the plane of the spread-out airbag.
- the tool preferably extends at least over the height of the airbag in its folded position.
- the tool for producing a constriction extends parallel to the plane of the spread-out airbag.
- the width of the tool is preferably less than the largest width measurement of the spread-out airbag.
- a sword-like tool can advantageously be provided for producing the constriction.
- This tool has at least a height corresponding to the proposed height of the folded airbag so that the airbag is constricted over the entire height when sliding the tool sideways into the airbag.
- a wire-like tool is provided for producing the constriction and extends substantially at right angles to the spread-out airbag.
- one sword-like or wire-like tool each is provided for producing each one constriction.
- prefolding of an airbag for a passenger airbag module it is expedient for the prefolding of an airbag for a passenger airbag module to provide a tool so that a constriction is produced during its operation.
- prefolding an airbag for a driver airbag module it is expedient to provide four tools so that when operated four constrictions are produced.
- a further design of the tool is characterized in that a space is provided for folding the airbag between a lower cover plate and an upper cover plate of which one is movable, that the sword-like tool runs between the cover plates and at right angles to same, that the space for folding the airbag is restricted at the side by sliders which are displaceable between the cover plates, that in the lower cover plate an opening is provided for an airbag housing and next to this at least one slider is provided which can be moved at right angles relative to the cover plates, and that in the upper cover plate in the area of the airbag housing an opening is provided in which a removable packing ram is mounted which can be moved at right angles to the cover plates and contains a place holder which can be moved perpendicular to the cover plates.
- the place holder has, at right angles to the direction of movement, roughly the cross-sectional shape of a flue of a diffuser inserted in the airbag housing.
- FIG. 1 is a view from below of a spread-out airbag for a passenger airbag module and an associated sword-like tool;
- FIG. 2 shows the airbag according to FIG. 1 with a constriction and the associated tools for compressing the airbag
- FIG. 3 shows a sectional view through FIG. 2 according to the line III-III;
- FIG. 4 shows the folded airbag
- FIG. 5 shows a view from below of a spread-out airbag for a passenger airbag module with two associated sword-like tools
- FIG. 6 shows the airbag according to FIG. 5 with constrictions
- FIG. 7 is a plan view of the airbag for a driver airbag module with an associated sword-like tool
- FIG. 8 shows the airbag according to FIG. 7 with constriction
- FIG. 9 is a view from below of a spread-out airbag for a driver airbag module with associated sword-like tools
- FIG. 10 shows the airbag according to FIG. 9 with constrictions and the tools for the compression of the airbag
- FIG. 11 shows the folded airbag according to FIG. 9
- FIG. 12 is a view from below of a spread-out airbag with constrictions and associated wire-like tools for producing the constrictions;
- FIG. 13 is a view from below of the spread-out circular airbag
- FIG. 14 is a plan view of a tool, partially cut away for constricting the airbag parallel to the plane of the spread-out airbag;
- FIG. 15 is a sectional view through the tool according to FIG. 14 in the direction of arrows XIV—XIV;
- FIG. 16 shows the tool according to FIG. 15 with folded airbag
- FIG. 17 is a sectional view through a further embodiment of a tool
- FIG. 18 is a plan view of the tool according to FIG. 17;
- FIGS. 19-21 show the tool according to FIG. 17 in successive stages of the airbag folding.
- FIG. 1 shows a spread-out airbag 1 which has a blow-in mouth 2 for a tubular gas generator.
- a sword-like tool 3 is associated with the spread-out airbag.
- the spread-out airbag lies on a backing support 4 and is covered at the top by a vertically adjustable cover 5 (FIG. 3 ). The distance between the backing support and the cover thereby corresponds to the desired height of the folded airbag.
- the top side lb lies on the backing support 4 and the lower side la with the blow-in mouth 2 lies on the top.
- the airbag is spread out over the backing support and stretched smooth.
- the cover 5 is then brought to the required distance against the backing support.
- the first and substantially new step of the folding processes now consists in moving the sword-like tool 3 between the backing support 4 and the cover 5 towards the airbag 1 .
- a constriction 6 is produced as shown in FIG. 2 .
- the airbag then has the shape shown in FIG. 2 of a tooth with two roots.
- the constriction represents a pre-orientation for the following chaotic folding of the airbag.
- the airbag is compressed following the creation of the constriction by means of the sliders 7 to 11 .
- the airbag is first compressed by the sliders 7 , 8 and 9 in one direction and then compressed to the required size by the sliders 10 and 11 at right angles thereto.
- the chaotically folded airbag has the shape shown in FIG. 4 . It can be seen that the constriction 6 remains set during the compression and at the end of compression so that separate folded areas with chaotic folds 1 c are produced. The danger of parts of the airbag overlapping one another during compression is thereby substantially reduced.
- FIGS. 5 and 6 show the production of two constrictions 6 a and 6 b by means of two sword-like tools 3 a and 3 b . After their action on the airbag, the airbag has the shape shown in FIG. 6 with constrictions on two sides.
- FIG. 7 shows an airbag 16 a spread out for a driver airbag module which is folded on one side in the shape shown in FIG. 8 by means of a sword-like tool 3 .
- FIGS. 9 to 11 show how an airbag 16 b is pre-folded by means of four sword-like tools 12 to 15 .
- the airbag 16 b is spread out on a backing support (not shown) and covered by a cover at the required distance from the backing support.
- Constrictions 17 to 20 are then formed in the airbag by means of the sword-like tools.
- the airbag then has the shape shown in FIG. 10 of a four-leaf clover.
- the airbag is then compressed by means of the sliders 21 to 24 i.e., a chaotic folding is achieved.
- the airbag After compression, the airbag has the shape shown in FIG. 11 . It can be seen that even in this case after folding, the constrictions 17 to 20 are present. Through the division of the airbag into four partial areas by means of the constrictions, the risk of overlapping of the folds during compression is substantially reduced.
- wire-like tools 25 to 28 are provided for producing the constrictions in place of the sword-like tools.
- These wire like tools are shown in section in FIG. 12 and extend through slits in the backing support (not shown) and in the cover (not shown) and are displaced relative to the airbag by a drive which is known per se and is not shown.
- the compression of the airbag to the size required for storage in the airbag module is carried out as shown with the embodiment in FIGS. 9 to 11 .
- an airbag 29 is shown in the spread-out position which is to be constricted parallel to the expansion plane and then gathered together.
- two slider-like tools 30 , 31 are provided by means of which the outer areas 32 , 33 of the airbag 29 are constricted to a gas generator 34 so that they have the position shown in FIG. 14 . Gathering sliders 35 to 38 can be seen in this FIG.
- the airbag has in the area of the constrictions upper parts 39 and lower parts 40 which are then folded chaotically by means of the gathering sliders 35 to 38 which are restricted top and bottom by cover plates 41 , 42 wherein at least one cover plate should be movable for opening the folding space.
- FIG. 17 shows a section through a tool which as in the embodiment of FIG. 1 has a sword-like tool 3 .
- This is guided between a lower cover plate 43 and an upper cover plate 44 and runs perpendicular to same.
- a cut out section for holding a housing 50 in which the airbag having the diffuser 51 can be inserted.
- the diffuser has a flue 52 which has outlet openings (not shown) for the gas emerging from the gas generator.
- the gas generator is fixed in the diffuser before or after folding the airbag.
- a packing ram 53 is positioned in the cut out section in the upper cover plate 44 and a place holder 54 is guided in the packing ram whereby the cross-section of the place holder corresponds in the direction of movement to the cross-section of the flue 52 .
- the place holder 54 lies on the flue 52 whereby only the top side 1 b of the airbag 1 is fixed between the two, and the space above the flue is kept free during the entire folding process so that the top side in the area of the flue 52 runs separately from the lower side 1 a .
- the separate path is ensured on the side of the flue 52 by a slider 55 which prevents the top and bottom sides from overlapping when folding the airbag.
- FIGS. 17 and 18 the airbag 1 is shown already partially folded whereby a constriction 6 is produced by the sword-like tool 3 and the airbag has been brought by the sliders 47 , 48 to the width required for storage.
- the slider 45 and 46 After the airbag has been prefolded in the manner shown in FIGS. 17 and 18 it is further gathered by means of the sliders 45 and 46 .
- the slider 45 In FIG. 19, the slider 45 is shown in its end position. The left of the airbag is folded completely chaotically. The slider 46 has reached its intermediate position and thereby the right airbag part is prefolded chaotically. A fold 49 defined by the slider 55 thereby remains set.
- the slider 55 is drawn back from the space between the cover plates 43 and 44 and the slider 46 is brought into its end position as shown in FIG. 20 . Also in this folding state, the fold 49 remains and thus the separate position of the lower part 1 a and upper part 1 b remains between the place holder and the flue on one side and the fold 49 on the other.
- the gathered airbag is pressed by the packing ram 53 past the flue 52 into the housing 50 as shown in FIG. 21 .
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/741,519 US6623034B2 (en) | 1996-05-28 | 2000-12-19 | Airbag having chaotic folds and airbag module with the same |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19623041 | 1996-05-28 | ||
DE19623041 | 1996-05-28 | ||
DE19702799 | 1997-01-14 | ||
DE19702799A DE19702799C2 (en) | 1996-05-28 | 1997-01-14 | Airbag, method for folding it and device for carrying out the method |
PCT/DE1997/000918 WO1997045296A1 (en) | 1996-05-28 | 1997-05-02 | Airbag, method of folding the latter, and device for carrying out the method |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/000918 A-371-Of-International WO1997045296A1 (en) | 1996-05-28 | 1997-05-02 | Airbag, method of folding the latter, and device for carrying out the method |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/741,519 Continuation US6623034B2 (en) | 1996-05-28 | 2000-12-19 | Airbag having chaotic folds and airbag module with the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US6250675B1 true US6250675B1 (en) | 2001-06-26 |
Family
ID=26026430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/194,373 Expired - Lifetime US6250675B1 (en) | 1996-05-28 | 1997-05-02 | Airbag, method of folding the latter, and device for carrying out the method |
Country Status (6)
Country | Link |
---|---|
US (1) | US6250675B1 (en) |
EP (1) | EP0900156B1 (en) |
JP (1) | JP3325027B2 (en) |
BR (1) | BR9709278A (en) |
ES (1) | ES2157574T3 (en) |
WO (1) | WO1997045296A1 (en) |
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US6406061B1 (en) * | 2000-04-11 | 2002-06-18 | Nihon Plast Co., Ltd | Method of folding air bag body |
US6422588B2 (en) * | 2000-02-28 | 2002-07-23 | Trw Occupant Restraint Systems Gmbh & Co. Kg | Method for the transfer of a gas bag for a vehicle occupant restraint system into a mounting provided for the gas bag |
US6499765B2 (en) * | 2000-10-31 | 2002-12-31 | Delphi Technologies, Inc. | Bias deployment inflatable air bag |
WO2003047918A1 (en) * | 2001-12-07 | 2003-06-12 | Autoliv Development Ab | An apparatus for and method of folding an air-bag |
US20030116950A1 (en) * | 2001-12-21 | 2003-06-26 | Daniel Zink | Method and apparatus for folding an airbag |
US6610000B1 (en) * | 1999-11-26 | 2003-08-26 | Toyoda Gosei Co., Ltd. | Method of folding air bag |
US20030171200A1 (en) * | 2000-04-11 | 2003-09-11 | Kazuyoshi Nishijima | Method and device for folding up air bag, and air bag |
US6623034B2 (en) * | 1996-05-28 | 2003-09-23 | Takata-Petri Ag | Airbag having chaotic folds and airbag module with the same |
US20040045647A1 (en) * | 2001-09-14 | 2004-03-11 | Trw Automotive Safety Systems Gmbh & Co., Kg | Method of folding a gas bag for a vehicle occupant restraint system and folded gas bag |
WO2005082013A2 (en) * | 2004-02-23 | 2005-09-09 | Takata Restraint Systems, Inc. | Method and apparatus for folding an air bag for stowing in an air bag module |
US20070096448A1 (en) * | 2005-10-21 | 2007-05-03 | Nihon Plast Co., Ltd. | Air-bag and method of folding the same |
US20070108752A1 (en) * | 2004-11-15 | 2007-05-17 | Takata-Petri Ag | Method for the production of a gas bag packet for an airbag module |
US20080042415A1 (en) * | 2004-03-23 | 2008-02-21 | Takata Corporation | Airbag apparatus and method of folding airbag |
US20080258446A1 (en) * | 2004-11-15 | 2008-10-23 | Takata-Petri Ag | Method for the production of a gas bag packet for an airbag module |
US20110127756A1 (en) * | 2008-12-10 | 2011-06-02 | Takata-Petri Ag | Method and device for folding an airbag for an airbag module |
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US20170197577A1 (en) * | 2014-06-02 | 2017-07-13 | Trw Automotive Safety Systems Gmbh & Co. Kg | Method for folding an airbag, and airbag module |
US9975513B2 (en) * | 2015-08-26 | 2018-05-22 | GM Global Technology Operations LLC | Protection arrangement for a passenger of a vehicle, vehicle with the protection arrangement and method for manufacturing the protection arrangement |
US10239482B2 (en) | 2014-06-02 | 2019-03-26 | Trw Automotive Safety Systems Gmbh | Method for folding an airbag, and airbag module |
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DE19546232B4 (en) | 1995-09-22 | 2004-05-19 | Takata-Petri Ag | Device for folding an airbag for an airbag module |
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US6250675B1 (en) | 1996-05-28 | 2001-06-26 | Petri Ag | Airbag, method of folding the latter, and device for carrying out the method |
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DE102009033561A1 (en) * | 2009-07-16 | 2011-01-20 | Autoliv Development Ab | Method for folding a gas bag for an airbag module for a motor vehicle, an airbag module and a device for folding a gas bag for an airbag module |
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Also Published As
Publication number | Publication date |
---|---|
JP2000501354A (en) | 2000-02-08 |
ES2157574T3 (en) | 2001-08-16 |
EP0900156A1 (en) | 1999-03-10 |
WO1997045296A1 (en) | 1997-12-04 |
JP3325027B2 (en) | 2002-09-17 |
EP0900156B1 (en) | 2001-03-07 |
BR9709278A (en) | 1999-08-10 |
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